feat: add CI Component template

templates/nix-gitlab-ci.yml

@@ -0,0 +1,38 @@
+spec:
+  inputs:
+    image_tag:
+      type: string
+      description: "latest | latest-cachix | latest-attic etc."
+      default: latest
+---
+
+stages:
+  - build
+  - trigger
+
+nix-ci:build:
+  stage: build
+  image: registry.gitlab.com/technofab/nix-gitlab-ci/nix-ci:$[[ inputs.image_tag ]]
+  before_script:
+    - source setup_nix_ci
+  script:
+    # build the generated-gitlab-ci.yml
+    - nix build .#gitlab-ci-config
+    - install result generated-gitlab-ci.yml
+  after_script:
+    # upload to binary cache
+    - finalize_nix_ci
+  artifacts:
+    paths:
+      - generated-gitlab-ci.yml
+
+nix-ci:trigger:
+  stage: trigger
+  needs:
+    - nix-ci:build
+  trigger:
+    include:
+      - artifact: generated-gitlab-ci.yml
+        job: nix-ci:build
+    strategy: depend
+